Door lock



June 30, 1925.

c. HOFFMN DOOR LOCK Filed Oct. 9, 1922 3 Sheets-Sheet 1 June 3o, 1925. 1,544,319

C. HOFFMAN DOOR LOCK Filed 001;, 9, 1922 3 Sheets-Sheet 2 `lune 30, 1925. 1,544,319

. C. HOFFMAN DOOR LOCK Filed Octv 9, 1922 3 Shee'cs-Sheeil 5 Patented June 30, 1925.

UNITED STATES CARL HOFFMAN, OF ALLENTOWN, PENNSYLVANIA.

DOOR LOCK.

Application filed October To all whom t may concern Be it known that I, CARL HOFFMAN, a citizen of the United States, residing at Allentown, in the county of Lehigh, State of Pennsylvania, have invented certain new and useful Improvements in Door Locks; and I do hereby declare the following to be a full, clear, and exact Vdescription `of the invention, such as will enable others skilled in the art to which itv appertains to make and use the same.

My invention relates to door locks and more particularly to such as combine in a single element the latch by which the door may be readily opened upon manipulation of a knob and the dead bolt which requires al keyto operate it, and the object of my invention is to provide a simple and eiiicient device of this character composed of but few parts so assembled as to insure ease and certainty in operation and securityY in both its use as a latch. and a lock.

In the drawings, Figure 1 is a view in side elevation with the cover plate'of` the lock case removed and the door and its casing shown in section., the parts being illustrated in latching position; Figure 2 is a vertical sectional view on line 2 2, Figure v1. `Figure 3 is a cross sectional `view on line 3--3, Figure 1. Figure 4 is a vertical sectional view on line 4.-4, Figure2;l Figure ris a detail perspective view of the latch and` its supporting arm.' Figure 6 is a detail perspective view showing the two spindles with their knobs and the latch operating lever. Figure7 is aview similar to Figure'1, showing the latch held in vretracted position.- Figure 8 'is a view in side elevation with the cover plate broken away ytofshow the latch in dead lock position. Figure 9 is a detail perspective fview of a portion ofthe lock case. FigurelO is anenlarged view and Figure 11 a perspective view of the stop for holdingy the latch retracted. i Figure-'12 is a perspective view of the means for holding the latch dead locked. n l

. The lock case is of the usual type having side plate 2 which fits flush with the edge of the door; bedplate 3 with posts and guides; a cover plate 4, these plates having the necessary-openings for the different'parts of the lock. 5 designates the latchsupported'at one end of alright angulararm or'l'ever 6 which has a downwardly extending lug-7. A "spring Shears against the latch 5 to urge ,it into latchina position and fromwhh p0`A 9, 1922. Serial No. 593,283.

sition it may be withdrawn by a lever 9 Operated by outer or inner knobs at the ends of spindles 10, 11, the squared end of the latter fitting in the squared-bore of the hub 12 of the-lever. This squared end of the spindle lllyis mortisedvas at 13 to receive the tenon 14 of the spindle 10 and it alsohas a lateral projection 15.

At 2O I have shown the latch bolt. This is provided with a slot 21 to receive a projection 22 of the bed plate which with -a bar 23 of the latter and the pin 24 working in a second slot 25 of the latch bolt forms a guide for such latch bolt. Talons 26-27 `and 2828a form the means `by which the bolt is moved by a key. At the end of the latch bolt next adjacent the latch ,is a rstud 29` which is designed, in one position of the parts (see Figure 8), lto act as a stop, contacting with the hack of the latch 5, to prevent retraction of the same and `in another position (see Figure 1) to retract the latch uponmanipulation of the bolt by a key, the stud in this last named position acting against the downwardly extending 'lug 7 of thel latch. A lateral projection 30 is prol vided on the latchbolt by which it may be locked in its different positions, cut outs 31 of a spring controlled Vtumbler 32 registering with suchprojection for that purposethe tumbler being-pivoted on the pin, 24 so'that Y it may be moved from engagement with the latch bolt by a `key, preparatory to movement of the bolt by such key.

For the :purpose of holding the latch either retracted or set as a dead bolt I provide a stop button the arm 41 of which may be turned to engage the supporting arm of the latch, as shown in Figure 7, to hold it retracted or, when the latchV is protracted to hold it against movement, the arm 41 be1ng so shaped, as indicated in Figure 11 as to engage theend of lthe latch arm 6, as shown in Figure 10. Fingersl 42 are provided on the shank of this button to engage a short post 43` and limit the turning movement of vthe stop. v

As heretofore explained, the spindles 10 and 11 are tenoned and mortised so that operation of the lever arm bythe knob on the outside of the door can only be accomplished ,when itsftenon is fitted in the mortise ofthe spindle 11. In Figure. 2 I have shown the parts in operable position. If 1t be desired to preventoperation of the latch from thetcatsde by the door. knob, when the latch bolt -is npt set in locking ppsitiOlL the inner knob 51' is turned so that the lateral projection 15 may pass under the lip`52on the inside of the door plate' which -willallow the spindle 10 to be drawn inwardly and out of engagement With its complementary spindle 9. The lip, upon appropriate turningof the knob, then acts as a'stop against inward movement of the spindle 1l. So diseneased? the .outer spindle 1.0 vill' merely swing around Without in any Way effecting movement'ofthelever. 4S0 that the knob 5() may-'always' be in a position Where its 5tenon fbe ready lor engagement' iviththe spindle ll li provide Weight 53 on the knob vvhich Will cause the vknob to swing so that thetenon will normally standvertiCally. 'l 'ln thefposition fof the parts shan/n in Figure l,y the' latch may be manipulated the spindlev ll fromv inside the door and by the spindle lQ'fromoutside il the tvvo spindles areA in coupled position.Y It" not coupled the latch Vmay'only be operated from the outside by akey acting lirst to disengage the. tum',- bler 32 and then against the talon 27 ot the latcjhibo'lt which \vil. l,thre ughv engagement f 4the studA 29 with the lug '7f of the latch force the latterA against the tension otr-its spring Te dead' lock. the latch bolt Vit is necessary to use a key fromA either inside or vQ utside and .onjceset in locking position this latch bolt cannot be movedjby any manipula tionof the lever 9, akey being necessary to first remove the latch bolt from its locking position. y.'Ihe parts. are shown in their `ocked position Figure 8.

cl'aimvas my` invention: ll. latch and lock mechanism for doors including a case, a movable latch, actuating means for saidl latch, a single movablekey actuated member *for locking said latch against retraction, being directly engageable With said latc h ,z mdr said key actuated member being lcooperable vvith said latch for actuating the same.

Q. latch and lock mechanism fordoors including a case, a movable latch, actuating means for saidlatch,a movable hey. actuated member for 'locking said latchj against retraction, means controlledV 'the movement ofsaid member and. cooperating with said latch'ifer actuating the same, and mea-ns for pender'ing both of said latch actuatingjmeans ineffective."v i

3. A latch and lockinechanism for doors including a case, a Spring actuated/latch, a leverwformretractihgjsaid' latch; a pair of spindles lor operating said lever, means permitting disengagement of ene ofv` said spi-ndles tofprevent manipulation ol the lever rotation of thefspindle, and mea-ns engage able vvlithfsaid lever for locking' Ythe same against 'movement by either spindle.' i 'latch'andv lockme'c'hani'smf for doo-rs, inilding a @fa-.Ses Spr-'ing act-dated' letali-ra lever tor retracting said latch, a pair ol spindles for operating said lever, means pei niitting` disengagement ol one of. said spindles to prevent manipulation of the lever by rotation of the spindle, and key actuated means movable in one direction for lockingr said lever against actuation by either spindle and movable in another direction for moving said latch and lever therewith.

5. A latch and loch mechanism `for doors including a case, a springv actuated latch. a lever for retiacting said latch, a pair oi spindles for operating said lever, means permitting disengagen'ient of one ot said spindles. to prevent manipulation ci the lever by rotation ot the spindle, means cooperating with saidlatch tcr'locling said lever against movement by either spindle, and means controlled by the movement ol said latch-locking means lor moving said latch and lever.

6. A latch and lock mechanism for doors including av case, a spring actuated latch. a lever for retracting said latch, a pair ol spindles for operating said lever, means permitting disengagement of' one of said spindles to prevent manipulation ol the lever by rotation ofY the spindle, key actuated means cooperating ivi-th said latch tor loching saidmieveragainst movement by either spindle, and means controlled by the movement ofsai'd' latch-locking means for moving said latch andlever.

7. latch and lock mechanism for doors including a case, a springactuated latch, a lever for retracting said; latch, knob operated spindles for moving said lever, means for retracting said latch independently of saidspi-ndles, and means engageable with said lever for locking said latch against retraction by said lever or said last named means.

6. A latch and lock mechanism lor doors including a case, a spring actuated latch having al right angular portion, a lever designed to engage said right angular portion to retract' said latch, .means for operating said lever, a movable member for engaging and holding said latch against movement by said lever, a spring actuated tumbler for locking said member in holding position` andY means associated with said member and latch reti-'acting the latter upon movement of said member in one direction.

9. latch and' 'lock mechanism for doors including, a case, a" spring actuated' latch having a' right angularV portion, a lever d'esignedfto engage said righ-t angular portion to retract said latch` means for operating said lever, and av key-actuated tumblerecontroll'ed" member having" means for engaging said latch, said' member being movable into one position to lock said' latch against movement by said lever and' into another position to retract said latch by key manipulation;

fil

llO

10. A latch and lock mechanism for doors including a case, a spring actuated latch having a right angular portion, a lever designed to engage said right angular portion to retract said latch, means for operating said lever, a key-actuated tumbler-controlled member having a stud for engaging said latch, said member being movable into one position to lock said latch against movement by said lever and into another position to retract said latch by key manipulation, and means engaging said right angular portion of said latch to lock the latter against movement by either said lever or key actuated member.

- 11. A latch and lock mechanism for doors including a case, a spring actuated latch, a lever for retracting said latch, a spindle connected with said lever for operating it from one side of a door, a second spindle With which said first named spindle is designed to engage to operate said lever from the opposite side of a door, a stop acting on `said iirst mentioned spindle to prevent coupling with said second spindle, and means engageable with said lever for locking the same against movement by either spindle.

12. A latch and lock mechanism for doors including a case, a spring actuated latch, a lever for retracting said latch, a spindle connected With said lever for operating it from one side of a door, a second spindle with which said irst named spindle is designed to engage to operate said lever from the opposite side of a door, a stop acting on said first mentioned spindle to prevent coupling with said second spindle, key actuated tumbler-controlled means for engaging said latch, said means being movable into one position to lock said latch against movement by either spindle and into another position to retract said latch by key manipulation, and a rotary element cooperating with said latch toprevent operation by said spindles or said key actuated means.

13. In a latch and lock mechanism for doors, the combination 'of a rotatable spindle including separable interlocking sections, knobs on said spindles and a Weight on one ot said spindles for maintaining it in a predetermined position to engage the end et' the other spindle.

14. In a latch and lock mechanism for doors, the combination of a rotatable spindle including separable interlocking sections, knobs en said spindles and means acting upon one of said spindles normally tending to maintain it in a predetermined position to engage the end of the other spindle.

In testimony whereof I have signed this speciication.

CARL HOFFMAN.

(iti 

